Drive Shaft FAQ:
- What is a conversion u-Joint?
- Is it possible to have 2 different u-joint sizes on my drive shaft
- What causes drive shaft vibration?
- Why does a drive shaft twist or bend?
- What causes universal joints to break?
A conversion u-joint is a universal joint with two different size caps, which is used when you want to use a larger series driveshaft than what your vehicle’s transmission or rear differential already has. For example: If you have 1330 series end yoke on the transmission or rear differential but you want to use a stronger 1350 series drive shaft. A conversion joint would then be used because it will have two caps that are 1330 series and the other two caps would be 1350 series sized caps.
Yes. This is a common, especially if the transmission or rear end of your vehicle has been modified. If you think that you have two different sizes on the same u-joint, you may have a conversion joint.
There can be many reasons for a drive shaft to vibrate. One reason for drive shafts to vibrate is components beginning to wear out. The most common component related reasons for a drive shaft to vibrate:
- Worn or Broken u-joint—MSI U-joint Failure Guide
- Worn out spline on slip yoke or tube shaft
- Drive shaft tubing damage—MSI Tubing Failure Guide
- Balance weight missing
- Lack of grease—MSI Driveline Lubrication Guide
***ALWAYS have your drive shaft balanced after replacing components ***
Aside from have components damaged or worn out that cause your driveshaft to vibrate. There are many other technical reasons for drive shaft to vibrate:
- Drive shaft is the improper length
- Improper drive shaft angle
- Drive shaft out of phase
- Wrong size u-joints for application
Please refer to our Tubing Failure Page
Please refer to our Universal Joint Failure Page